Improvement in flasks for casting pulleys



' 2 sheers--sheet 2;

vw. Hurou.

i Flask for Casting Pulleys. No. 159,097. Patenfedlamzmmnf.

PATENT OFFICE.

WILLIAM IIUTToN, or PHILADELPHIA PENNSYLVANIA.

mPRovEnENTiN FLAsKs Fon cAsTlNe PuLLEvs.

Speeidcation forming part of Letters Patent No. l

59,097, dated January 26, 1875; 'applicatior iile August 11, 1874.

To all whom it may concern:

Beit known that-I, WILLIAM HUTToN, of.

e Philadelphia, Pennsylvania, have invented an Improved Flask for Making Pulleys and other Circular Forms ;4 and I do hereby declare the following to be full and correct descriptionof the same, reference being had to the accompanying drawings, in which- Figure 1 represents my flask, partlyin section, with the pattern of the hub and arms in place. Fig. 2 isa sectional view of my flask,

showing the mold with the pattern withdrawn,

ready for casting. Fig. 3 represents the inside lask with the sweep in the act of sweepi* ing up the outside face of the pulley, and Fig.

4v is the sweep in position to sweepup the inside face of the pulley.

The object of my invention is to form a mold for casting pulleys or other circular forms 'f u wthoutthe use ol' patterns; and it consists in forming the ask in two parts, one for the inside face of the pulley or other circular form, together with the hub, arms, \&c., and the other for the outside face, by sweeping up the i two faces by means of sweeps.

rIn the drawings, A represents the bottom Y part of the outside ask, and A the. top part or cope; B, the bottom, and B the cope of the inside flask. In the inside ask the hubv and larms of a. pulley-pattern, M, are molded up in the usual manner, except that the arms extend through oriii ces in the side of the ask, and extend outward, asshown at m. After 'the inside ofthe inner flask is properly rammed. v and the cope in place,' the outside of theask B B' is rammed up between flanges b and b with sand, there being points ,-or projections l'nponthe surface, for keeping the sand in place. This surface ofsand is then swept by Y f the-sweep C, as shown in Fig. 4, the iianges .I The outerflask is then secured together by 'means of the lugs, in the usual manner, and

the inside, between the flanges a and a', is rammed up with sand, the projections t' hold ing't-he sand, and swept down with the sweep D, as shown in Fig. 3, until an even surface is formed -for the outside 'surface of the rim of the pulley. The asks are 110W put one within another, and .they are ready for casting.

Of course otherY circular forms may be cast in the same manner; but I illustrate my invention with a pulley-mold also, other asks may be used, such as snap-flasks;7 which may be an advantage in sweeping up.

When a large rim is to be cast, rings may be placed between the cope and bottom of both-inner and outer asks, and the same desired result accomplished.

The operation ot' my device is as follows.: Take one halfv of the pattern of ,the hub and arms of the pulley, and lay it upon a followand dress up. Fill up the outside of the Hash` a a with sand, and ram. Sweep with the convex sweep D, put the two flasks together.V make a gate in the t'op, and it is ready for casting. Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-` 'In a flask for makingv pulleys, the combina-- tion of an outer flask, consisting of the bottom A and cope A', provided with the flanges a a', and an inner ask, consisting of the bottom B and cope B', provided with the' danges band bf, and-adapted to have the molds formed therein byA means of the sweeps C and D, substantially as described. l

-The above specification of .my said inventionsigned and witnessed, at Philadelphia,

Witnesses J AMES BRAMBLE, J r.,

J AMES J FRAIZER. 

